Beater roll



June 26, 1934. H311 RANDALL 1,964,690

BEATER ROLL Filed Oct. 20. 1933 w, mama Patented June 26, 1934 UNITED STATES PATENT OFFICE BEATER ROLL Herbert 'r. Randall, Hamilton, Ohio,

assignor to The Champion Coated Paper-Company, Hamilton, Ohio, a. corporation of Ohio Application October 20, 1933, Serial No. 694,485 '1 Claims. (01.92-22) 19 and replacement of the fly barsand the space between the fly bars being left open, allowing free movement of pulp through the beater roll; all as more fully hereinafter set'forth and as claimed.

A beating engine as used for processing fibrous pulp in paper manufacture generally comprises in combination an endless trough or the like, a metal bed plate mounted in the bottom ofthe trough, and a multi bladed beater roll adapted to revolve in the trough adjacent the bed plate, 26 the blades or fly bars of the beater roll clearing the bed plate a small fraction of an inch. In operation a charge of pulp in water suspension is placed in the engine, and is circulated around the trough by the roll. The rapidly revolving fly bars working in conjunction with the metal bed plate agitate and churn the pulp suspension, and hasten the hydration of the pulp fibers. In addition, some disintegration of the fibers takes place. .Ordinarily the charge of pulp is circulated 30 through the beating engine for several hours. The heater roll runs at high speed, and the strains on it are severe. In order to insure rigidity the drive shaft is made extremely heavy; for a roll five feet in diameter the shaft is nine or ten inches in diameter. The fly bars must be securely mounted. A fly bar coming loose may wreck the roll and part of the. beating engine.

The ordinary beater roll generally comprises separate fly bars or blades mounted on spiders carried on the shaft. A wide variety of clamping devices for securing the blades to the spiders has been proposed. Usually these devices make use of wedges in some way. In addition, it is customary to stiifen and strengthen the blades by driving wedge shaped filler pieces of wood.

between. the bars. The wood swells when wet and holds the bars tightly. Although fllling between the fly bars has long been accepted as a necessary feature of beater rolls, it has the disadvantage of forming pockets between successive' fly bars in which pulp collects, reducing circulation and interfering with the normal beat ing. In addition, the wood flllers sometimes work loose. To overcome these objectionable features,

various designs of fly bars have been proposed.

According to the present invention I provide a beater roll in which the fly bars form practically a unitary structure with the spiders'and the shaft, whereby possibilitymf a fly bar coming 9 f loose is eliminated. In addition, in my construction filling or bracing between the fly bars is dispensed with. This eliminates any pockets or dead ends where pulp might collect; and in addition allows free movement of pulp through the 5 inter-blade spaces, which in turn allows a much faster circulation of pulp with the same expenditure of power. While securingthese advantages, my beater roll construction nevertheless permits remarkablyeasy removal and replacement of the 7 I fly bars. I secure these advant"ges by making the fly bars integral with detachable flanges mounted on the spiders, by means of welding. In the drawing I have shown, more or less diagrammatically, two modifications of a-beater roll within my invention. In the showings,

- Fig. i is a view partly in elevation, partly in vertical section, of one form of welded beater roll, a bed plate also being shown;

Fig. 2 is apartial view in vertical section taken at right angles to the view of Fig. 1;

Fig. 3v is adetail view showing the fly bars welded to the flanges: Fig. 4 is a similar view taken at right angles to the view of Fig. 3; and 5 Fig. 5 is a view, similar to Fig. 2 of a simplified form of beater roll. f

In these showings, in which like reference characters indicate like parts throughout the several views, numeral 1 designates the shaft or spindle of the roll which is connected at one end to a source of power, not shown. The shaft is carried inbearings of usual form. Referring to Figs. 1 to 4, the shaft is provided with a plurality of hubs 2 by turning down the shaft to a slightly reduced '95 diameter in the intervening spaces between the hubs. Each hub is provided with a collar 3 which is forced in position upon the hub by heavy pressure to prevent sidewise slipping of the collars. Each hub and collar is provided with a slot or key way into which the key 4 is driven to prevent rotational slippage on the shaft 1. 5 is a fly bar support, shown as a disk or spider welded to each collar 3. The shaft with the collars and disks constiute a strong, permanent durable support for mounting the replaceable beating elements. If desired, the spiders or disks may be welded directly to the shaft instead of using the collar construction described. Sometimes the spiders take the form of spolred wheels. Fig. 2

is a partial view of a roll and shows only two of the spiders. Usually four or flve are employed in a roll.

The disks 5 are bored with a series of holes 6 near the periphery. On each disk are mounted two flanges 7 also bored with a series oi holes 8 which arealigned with the holes 6 in the disks 5. Bolts f9 and nuts 10 securely hold the flanges to the disks 5. Flanges are used, instead of complete rings, in order to make possible the removal of each part from the beater when making replacements. number of spaced slots 12 into which are fitted a plurality of fly bars 13. The fly bars are welded to the flanges by weld joints 14. forming a solid one-piece structure therewith.

It will be seen that the beater roll consists of a permanent structure comprising the shaft and spiders; and two replaceable units, comprising the flanges 7'7, carrying welded integrally therewith the fly bars 13. In the present example the fly i or-metal filling between the-fly bars. The beater 1 roll is made entirely of metal. In addition, the structure provides free passage between the bars and the interior of the roll, whereby there is no possibility of the stock filling up in the spaces between the bars and interfering with beating and circulation. There are no pockets or dead ends; the roll is of open construction.

. When it becomes necessary to replace worn fly bars, the nuts 10 are burned oil with a torch.

v as

and the flanges, together with the fly bars 13, are lifted out bodily and replaced with new rings and bars. The shaft and the spiders are not disturbed. Long experience with beaters discloses very little necessity for replacing individual fly bars, because, when one bar becomes so worn or corroded as to requirereplacement, the other .on the fly bars is negligible, and in this case it is sometimes advantageous to dispense with the use of flanges and weld the beater bars directly to the spiders. In Fig. 5, I have shown a modifled form of welded roll particularly useful in heaters of this type. 'As shown, the fly bars are here welded directly to the disks, forming an inte'gral structure therewith. This construction gives an exceptionally strong roll, though of The flanges are provided with a' aeeaceo course the fly bars are not readily replaceable as in the rolls shown in Figs. 1 to 4. In Fig. 5 the disks we shown as welded directlyto the shait. Here the entire roll including the shaft is a onepiece structure. q

The beater roll in all its modifications is cheap and simple to construct and repair. Expensive and complicated blade locking devices are eliminated.

- My welded beater roll-presents several unexpected advantages when usedln a beating engine.

v In the case of an ordinary solid beater roll, having inter-blade spaces filled, the pulp charge must be compr so to speak, in order to pass between the beater roll and the bed plate. The inter-blade spaces act as troughsis trapped in them, compressed as the troughs pass the bed plate and then expanded again. In the present invention, the inter-blade spaces are clear. Hence when my roll is used in a beater engine there is no opportunity for air to become entrapped between the blades. Pulp circulates readily through theroll. The-improvement in rate of circulation is substantial. Circulation with the new roll is much faster than in the case of wood-filled rolls, under identical conditions of power, stock, and speed of revolution.

WhatIclaimis:-- I 1. A beater roll having a drive shaft and in-' terior spaced means adapted to support fly bars, and a plurality of spaced fly bars integral with said means forming a unitary rigid self-supporting structure therewith and providing passage between the fly bars to the interior of the roll. 1 10 2. The, roll of claim 1, wherein the supporting means comprise spiders carried by the shaft, and the fly bars are integral with the spiders.

3. The roll of claim 1 wherein the supporting means comprise spiders carried on the shaft and a plurality of flanges detachably mounted on the spiders, the fly bars being integral with the flanges.

4. The roll of claim 1, wherein the supporting means comprise spiders carried'by the shaft, and the fly bars aretvelded to the spiders.

5. The roll of claim 1, wherein the supporting means comprise spiders carried on the shaft and a plurality of flanges detachably mounted on the spiders, the fly bars being welded to the flanges.

6. An improved, all-metal beater roll compris-- ing in combination a drive shaft, a plurality of discoid spiders carried at spaced intervals on the shaft, a plurality ofarcuate. flanges for each spider, means for detachably mounting the I flanges on the spiders, and a plurality of spaced fly bars integral with the flanges and forminga unitary structure therewith, so as to permit the flanges and fly bars to be removed from the 

